package com.lzk.security.filter;

import com.alibaba.fastjson.JSON;
import com.lzk.common.jwt.JwtHelper;
import com.lzk.common.result.ResponseUtil;
import com.lzk.common.result.Result;
import com.lzk.common.result.ResultCodeEnum;
import com.lzk.security.custom.CustomUser;
import com.lzk.vo.system.LoginVo;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {
    private RedisTemplate redisTemplate;

    public TokenLoginFilter(AuthenticationManager authenticationManager,
                            RedisTemplate redisTemplate) {
        this.setAuthenticationManager(authenticationManager);
        this.setPostOnly(false);
        //指定登录接口及提交方式，可以指定任意路径
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/system/index/login","POST"));
        this.redisTemplate= redisTemplate;
    }

    @Override
    protected void unsuccessfulAuthentication(HttpServletRequest request,
                                              HttpServletResponse response,
                                              AuthenticationException failed)
            throws IOException, ServletException {
        ResponseUtil.out(response,Result.build(null,ResultCodeEnum.LOGIN_ERROR));
    }

    @Override
    protected void successfulAuthentication(HttpServletRequest request,
                                            HttpServletResponse response,
                                            FilterChain chain,
                                            Authentication auth)
            throws IOException, ServletException {
        CustomUser customUser = (CustomUser) auth.getPrincipal();
        String token = JwtHelper.createToken(customUser.getSysUser().getId(),
                customUser.getSysUser().getUsername());
        redisTemplate.opsForValue().set(customUser.getUsername(),
               JSON.toJSONString(customUser.getAuthorities()) );
        Map<String,Object> map=new HashMap<>();
        map.put("token",token);
        ResponseUtil.out(response,Result.ok(map));

    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request,
                                                HttpServletResponse response)
            throws AuthenticationException {
        try {
            LoginVo loginVo = new ObjectMapper().readValue(request.getInputStream(), LoginVo.class);
           Authentication authenticationToken =
                   new UsernamePasswordAuthenticationToken(loginVo.getUsername(), loginVo.getPassword());
           return this.getAuthenticationManager().authenticate(authenticationToken);


        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}
